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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
forecast for Sat, Mar. 30. 2024

 

Forecasted GDD Total: 390 (Base 32) through Sat, Mar. 30, 2024

  

Janesville, WI

       

Forecast »

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 29° 38° 12 2 0 0 0
02-16 16° 31° 13 2 0 0 0
02-17 10° 31° 13 2 0 0 0
02-18 24° 43° 25 3 0 0 0
02-19 20° 46° 36 5 0 0 0
02-20 27° 58° 57 15 0 0 0
02-21 40° 57° 83 32 7 0 0
02-22 35° 59° 108 46 12 0 0
02-23 22° 44° 119 48 12 0 0
02-24 31° 119 48 12 0 0
02-25 27° 58° 140 58 12 0 0
02-26 32° 68° 168 76 21 0 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 48° 72° 205 104 38 10 5
02-28 14° 45° 213 104 38 10 5
02-29 14° 45° 221 104 38 10 5
03-01 31° 46° 237 110 38 10 5
03-02 32° 61° 261 124 42 10 5
03-03 43° 73° 297 150 58 18 8
03-04 38° 66° 327 170 68 20 8
03-05 37° 51° 349 182 70 20 8
03-06 32° 53° 369 193 71 20 8
03-07 33° 53° 390 204 72 20 8
03-08 37° 43° 409 212 72 20 8
03-09 31° 40° 422 215 72 20 8
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 27° 45° 436 219 72 20 8
03-11 31° 66° 462 236 78 20 8
03-12 46° 68° 497 261 93 27 10
03-13 38° 69° 528 282 104 30 10
03-14 39° 54° 553 296 109 30 10
03-15 33° 53° 574 307 110 30 10
03-16 39° 51° 597 320 113 30 10
03-17 30° 38° 609 322 113 30 10
03-18 24° 35° 616 322 113 30 10
03-19 30° 57° 638 334 115 30 10
03-20 26° 42° 650 336 115 30 10
03-21 23° 35° 657 336 115 30 10
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 30° 34° 667 336 115 30 10
03-23 24° 37° 676 336 115 30 10
03-24 29° 40° 688 338 115 30 10
03-25 39° 55° 713 353 120 30 10
03-26 31° 51° 732 362 120 30 10
03-27 27° 39° 743 364 120 30 10
03-28 22° 46° 755 366 120 30 10
03-29 27° 55° 775 375 120 30 10
03-30 39° 56° 800 390 125 30 10
03-31 34° 50° 820 400 125 30 10
04-01 38° 50° 842 412 127 30 10
04-02 32° 47° 860 420 127 30 10
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 30° 54° 879 430 127 30 10
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 32° 47° 17 7 0 0 0
02-16 22° 32° 22 7 0 0 0
02-17 12° 23° 22 7 0 0 0
02-18 17° 38° 28 7 0 0 0
02-19 34° 43° 44 14 0 0 0
02-20 25° 43° 56 16 0 0 0
02-21 18° 38° 62 16 0 0 0
02-22 28° 32° 70 16 0 0 0
02-23 21° 33° 75 16 0 0 0
02-24 13° 25° 75 16 0 0 0
02-25 21° 33° 80 16 0 0 0
02-26 18° 39° 87 16 0 0 0
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 29° 37° 98 17 0 0 0
02-28 33° 45° 115 24 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 35° 52° 136 36 2 0 0
03-02 31° 36° 148 38 2 0 0
03-03 29° 39° 160 40 2 0 0
03-04 29° 46° 176 45 2 0 0
03-05 26° 47° 190 49 2 0 0
03-06 34° 45° 208 57 2 0 0
03-07 32° 45° 224 63 2 0 0
03-08 31° 44° 240 69 2 0 0
03-09 31° 37° 252 71 2 0 0
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 31° 34° 262 71 2 0 0
03-11 28° 34° 272 71 2 0 0
03-12 28° 36° 282 72 2 0 0
03-13 25° 30° 287 72 2 0 0
03-14 14° 32° 289 72 2 0 0
03-15 25° 46° 302 75 2 0 0
03-16 39° 43° 322 85 2 0 0
03-17 20° 43° 331 85 2 0 0
03-18 10° 23° 331 85 2 0 0
03-19 15° 39° 336 85 2 0 0
03-20 30° 47° 353 91 2 0 0
03-21 32° 54° 374 102 3 0 0
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 38° 47° 395 113 3 0 0
03-23 33° 45° 411 120 3 0 0
03-24 30° 44° 427 125 3 0 0
03-25 31° 42° 441 130 3 0 0
03-26 27° 41° 453 132 3 0 0
03-27 25° 44° 466 134 3 0 0
03-28 27° 44° 479 138 3 0 0
03-29 26° 35° 488 138 3 0 0
03-30 22° 47° 500 140 3 0 0
03-31 47° 70° 537 166 20 8 3
04-01 33° 49° 555 175 20 8 3
04-02 29° 55° 575 185 20 8 3
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 38° 52° 599 198 23 8 3
04-04 42° 57° 626 216 31 8 3
04-05 37° 65° 655 234 39 9 3
04-06 29° 51° 673 242 39 9 3
04-07 30° 52° 692 251 39 9 3
04-08 34° 63° 718 268 46 9 3
04-09 41° 67° 750 290 58 13 3
04-10 44° 72° 786 316 74 21 6
04-11 50° 77° 828 347 95 35 15
04-12 57° 81° 875 384 123 54 29
04-13 53° 82° 920 420 148 71 41
04-14 50° 81° 964 453 171 86 52
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 58° 80° 1011 490 198 106 66
04-16 32° 60° 1035 505 203 106 66
04-17 29° 37° 1046 506 203 106 66
04-18 32° 55° 1068 517 204 106 66
04-19 38° 46° 1088 527 204 106 66
04-20 42° 72° 1122 552 219 112 67
04-21 39° 55° 1147 567 224 112 67
04-22 33° 42° 1163 572 224 112 67
04-23 33° 41° 1178 577 224 112 67
04-24 31° 51° 1196 586 224 112 67
04-25 36° 46° 1216 595 224 112 67
04-26 30° 53° 1235 605 224 112 67
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 34° 65° 1263 623 232 112 67
04-28 39° 66° 1294 643 242 115 67
04-29 42° 52° 1318 658 247 115 67
04-30 37° 42° 1336 666 247 115 67
05-01 39° 50° 1359 678 249 115 67
05-02 41° 54° 1384 694 255 115 67
05-03 34° 60° 1409 709 260 115 67
05-04 40° 73° 1444 733 274 121 69
05-05 54° 75° 1486 766 297 136 78
05-06 56° 73° 1528 798 319 150 88
05-07 56° 83° 1576 836 347 170 102
05-08 53° 59° 1610 859 361 175 103
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 51° 68° 1647 887 378 185 108
05-10 50° 73° 1687 916 398 196 114
05-11 50° 80° 1730 950 421 212 124
05-12 59° 76° 1776 985 446 229 137
05-13 58° 69° 1817 1017 468 243 145
05-14 52° 61° 1851 1041 482 249 146
05-15 44° 68° 1886 1065 496 255 148
05-16 50° 78° 1928 1097 519 269 157
05-17 41° 62° 1958 1117 528 271 157
05-18 41° 72° 1992 1142 543 278 159
05-19 50° 63° 2027 1166 557 284 160
05-20 44° 71° 2062 1192 573 292 163
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 49° 77° 2103 1223 594 305 171
05-22 49° 76° 2144 1254 615 318 179
05-23 49° 81° 2188 1287 638 333 189
05-24 54° 72° 2229 1318 659 346 197
05-25 48° 67° 2264 1344 675 354 200
05-26 40° 74° 2299 1369 690 361 202
05-27 44° 77° 2338 1397 708 371 207
05-28 49° 82° 2381 1431 732 387 218
05-29 49° 84° 2426 1465 756 403 229
05-30 54° 87° 2474 1504 785 424 245
05-31 61° 91° 2528 1548 819 450 266
06-01 61° 87° 2580 1590 851 474 285
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 61° 89° 2633 1633 884 499 305
06-03 60° 89° 2686 1675 917 523 325
06-04 62° 81° 2736 1715 947 545 342
06-05 53° 84° 2782 1752 973 564 355
06-06 59° 75° 2828 1787 998 581 367
06-07 57° 76° 2872 1821 1023 597 378
06-08 48° 75° 2911 1851 1042 609 385
06-09 48° 80° 2953 1883 1064 623 394
06-10 58° 81° 3001 1920 1092 642 409
06-11 52° 67° 3039 1948 1109 652 413
06-12 42° 69° 3072 1972 1123 658 414
06-13 53° 68° 3111 2001 1142 669 420
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 55° 80° 3157 2036 1167 686 432
06-15 54° 75° 3199 2069 1190 701 442
06-16 48° 72° 3237 2097 1208 711 447
06-17 52° 80° 3281 2131 1232 727 458
06-18 58° 84° 3330 2170 1261 748 474
06-19 59° 86° 3381 2210 1292 770 492
06-20 58° 85° 3431 2250 1321 792 508
06-21 61° 87° 3482 2292 1353 816 527
06-22 61° 86° 3534 2334 1385 840 546
06-23 57° 87° 3584 2374 1415 862 563
06-24 59° 90° 3636 2416 1447 886 582
06-25 66° 77° 3686 2455 1477 907 599
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 66° 74° 3734 2493 1505 927 613
06-27 58° 80° 3781 2531 1532 947 628
06-28 60° 82° 3830 2569 1561 967 644
06-29 66° 85° 3883 2613 1594 993 664
06-30 68° 83° 3937 2657 1628 1019 685
07-01 67° 80° 3988 2698 1659 1042 703
07-02 68° 83° 4042 2742 1693 1068 724
07-03 61° 87° 4095 2784 1725 1092 743
07-04 67° 88° 4150 2830 1761 1120 766
07-05 70° 88° 4207 2876 1798 1148 790
07-06 63° 79° 4256 2915 1826 1169 805
07-07 57° 77° 4301 2950 1851 1186 817
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 61° 79° 4349 2988 1879 1206 832
07-09 56° 82° 4396 3025 1907 1225 847
07-10 60° 85° 4447 3066 1938 1248 864
07-11 66° 82° 4499 3108 1969 1272 883
07-12 60° 68° 4541 3140 1991 1286 892
07-13 59° 77° 4587 3176 2017 1304 905
07-14 66° 86° 4641 3220 2051 1330 926
07-15 66° 82° 4693 3262 2083 1354 945
07-16 60° 79° 4741 3300 2111 1374 960
07-17 58° 75° 4785 3335 2136 1391 972
07-18 53° 77° 4828 3368 2159 1406 982
07-19 56° 82° 4875 3405 2186 1425 996
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 64° 81° 4926 3445 2217 1447 1013
07-21 57° 80° 4972 3482 2243 1466 1027
07-22 59° 81° 5020 3520 2271 1486 1042
07-23 59° 81° 5068 3558 2299 1506 1057
07-24 61° 84° 5119 3598 2329 1528 1074
07-25 65° 87° 5173 3642 2364 1554 1095
07-26 67° 84° 5226 3686 2397 1580 1116
07-27 65° 89° 5281 3731 2432 1607 1138
07-28 68° 88° 5337 3777 2468 1635 1161
07-29 67° 81° 5389 3819 2500 1659 1180
07-30 62° 78° 5437 3857 2528 1679 1195
07-31 59° 79° 5485 3894 2555 1698 1209
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 61° 81° 5534 3933 2584 1719 1225
08-02 63° 82° 5584 3974 2615 1742 1243
08-03 63° 84° 5636 4015 2646 1765 1261
08-04 67° 83° 5688 4058 2679 1790 1281
08-05 63° 82° 5739 4098 2710 1812 1298
08-06 63° 78° 5788 4137 2738 1833 1314
08-07 64° 79° 5837 4176 2768 1854 1330
08-08 60° 83° 5887 4216 2797 1876 1347
08-09 59° 78° 5933 4253 2824 1895 1361
08-10 61° 82° 5983 4292 2853 1916 1377
08-11 65° 84° 6035 4335 2886 1941 1397
08-12 62° 84° 6086 4376 2917 1964 1415
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 59° 76° 6132 4412 2943 1982 1428
08-14 62° 67° 6174 4444 2965 1996 1437
08-15 59° 77° 6220 4480 2991 2014 1450
08-16 56° 79° 6266 4516 3017 2032 1463
08-17 60° 74° 6311 4551 3042 2049 1475
08-18 53° 75° 6353 4583 3064 2063 1484
08-19 60° 83° 6402 4622 3093 2084 1500
08-20 68° 90° 6459 4669 3130 2113 1524
08-21 64° 83° 6511 4710 3161 2136 1542
08-22 62° 87° 6563 4753 3194 2161 1562
08-23 75° 96° 6627 4807 3238 2197 1593
08-24 78° 95° 6692 4861 3283 2233 1625
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 70° 81° 6745 4905 3316 2259 1645
08-26 62° 73° 6791 4940 3342 2276 1657
08-27 58° 75° 6835 4975 3366 2293 1669
08-28 51° 79° 6879 5008 3389 2308 1679
08-29 63° 81° 6928 5048 3419 2330 1696
08-30 52° 70° 6968 5077 3438 2341 1702
08-31 46° 77° 7007 5107 3458 2353 1709
09-01 52° 81° 7052 5141 3483 2369 1720
09-02 60° 87° 7104 5183 3514 2393 1739
09-03 66° 92° 7161 5230 3551 2422 1763
09-04 67° 91° 7218 5277 3588 2451 1787
09-05 73° 86° 7275 5324 3625 2480 1811
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 68° 75° 7325 5364 3655 2502 1828
09-07 61° 68° 7367 5396 3678 2516 1838
09-08 59° 67° 7408 5427 3699 2529 1845
09-09 48° 75° 7448 5457 3718 2541 1852
09-10 54° 80° 7493 5492 3743 2558 1864
09-11 58° 65° 7532 5522 3763 2570 1871
09-12 54° 70° 7573 5552 3783 2582 1878
09-13 50° 66° 7608 5578 3799 2590 1881
09-14 44° 72° 7645 5604 3815 2598 1884
09-15 48° 76° 7685 5634 3836 2610 1891
09-16 58° 73° 7728 5668 3859 2626 1902
09-17 56° 70° 7769 5699 3880 2639 1910
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 50° 71° 7808 5727 3898 2649 1915
09-19 57° 68° 7848 5758 3919 2662 1923
09-20 60° 76° 7894 5793 3945 2679 1935
09-21 61° 74° 7939 5829 3970 2697 1948
09-22 64° 75° 7987 5866 3997 2716 1962
09-23 63° 80° 8036 5906 4027 2738 1979
09-24 58° 77° 8082 5942 4053 2756 1992
09-25 63° 73° 8129 5978 4079 2774 2005
09-26 63° 68° 8172 6012 4103 2790 2016
09-27 63° 68° 8216 6045 4126 2805 2026
09-28 59° 67° 8257 6076 4148 2818 2034
09-29 52° 75° 8298 6108 4169 2832 2043
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 60° 83° 8348 6147 4199 2853 2060

 

Latest Updates

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

February 12th, 2024Welcome to the 2024 GDD Tracking Season

2024 might be the year that if you blinked you missed winter. We've already experienced some very unseasonably warm weather in February with temperatures in the 60's. Temperatures are remaining relatively mild but I wouldn't be surprised if winter resurfaced yet as we move through the rest of February and March. GDDTracker starts counting on February 15. Spring is typically the time of year when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. However, there are many models you may find helpful throughout the season including the early season DMI timer and Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a fantastic 2024!